Battery Life; Removing The Battery - Canon EOS-1D Mark II Digial Instruction Manual

Battery Life

Temperature
At 20˚C / 68˚F
At 0˚C / 32˚F
The figures above are based on Canon's testing standards.
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The actual number of shots may be fewer than indicated above
depending on the shooting conditions.
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The number of possible shots will decrease with more frequent use of the
LCD monitor.
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The number of possible shots will also decrease if you hold down the
shutter button halfway for prolonged periods or only activate the
autofocus without taking a picture.
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If you keep recharging the Ni-MH battery without fully exhausting it first,
the battery's capacity will decrease. To learn how to avoid a decrease in
the battery capacity, refer to the Ni-MH Charger NC-E2's instructions.

Removing the Battery

Shots remaining
Approx. 1200
Approx. 800
1
Flip out the battery release
handle and turn it as shown by
the arrow.
2
Press the battery release button
and take out the battery.
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